In many modern versions this chapter is often given a subtitle like "Abram rescues Lot". And indeed he does, but that is only the context because the key event here in this part of the plot-line is the declaration of blessing by Melchizedek over Abram (vv18-20). The chapter divides naturally into two sections: 1) the capture and rescue of Lot, vv1-12, and 2) Abram's blessing, vv13-24. The chiasmus that holds each section together is clearly visible.
A. The Babylonian kings, v1
B. The Canaanite kings in the Valley of Siddim, v2
C. The battle of the Babylonian kings against other peoples, vv5-7
B'. The battle by the Canaanite kings in the Valley of Siddim, v8
A'. The victory of the Babylonian kings, v9-11.
A. Abram and his allies, Mamre, Eshcol, and Aner, v13
B. The King of Sodom, v17
C. Melchizedek priest of God Most High, v18
D. . . . he blessed Abram, "Blessed be Abram by God Most High," v19
C'. Blessed be God Most High, v20
B'. The King of Sodom, v21
A'. Abram's allies, Aner, Eshcol, and Mamre, v.24.
Low Chai Hok
©Alberith, 2021